8days past ovulation without normal breast pain. having light pressure cramping in uterus and pelvis for 3 days now. unusual?

Post ovulation: Eight days after ovulation if pregnant, implantation can cause cramping. Other causes of light cramping can occur with minor infections, too. Check with a serum HCG test for pregnancy (very accurate) if your period is late. If negative, see your healthcare provider for tests to make sure you don't have a vaginal or urinary infection.